Underground structure construction method using spread beam cross connection device in which the supporting force is improved

摘要

The present invention relates to a method of constructing an underground structure using a cross-connecting device with an improved bearing capacity, and more particularly, an excavation line setting step of setting an excavation line for constructing an underground structure, at regular intervals along the outside of the excavation line An installation line setting step of setting an installation line for installing an earth wall, an earth wall installation step of installing an earth wall in the ground along between the excavation line and the installation line, and an underground space by excavating the inside of the excavation line in a state in which the earth wall is installed An excavation step of forming, a wale installation step of installing a plurality of wales of the same height in the underground space excavated by the excavation step, a strut installation step of installing to support between the wales using a cross-connecting device and a plurality of braces , And a cover step of grouting the underground space in which the support beam is installed, and repeats the excavation step, the wale installation step, the support beam installation step, and the cover step step. According to the present invention as described above, it is possible to improve structural stability and work efficiency by connecting two braces to cross each other at the same height or on the same plane, thereby improving the holding force of the underground structure.